Stockholm, the capital of Sweden, is built on an archipelago of 14 islands connected by more than 50 bridges. Because of its layout and the abundance of clean water, it is frequently referred to as the 'Venice of the North.' The city's history dates back to 1252, centered in the medieval district of Gamla Stan (Old Town), where the Royal Palace and the narrowest alley in Sweden are located. Stockholm is the cultural and political heart of Sweden and is the venue for the annual Nobel Prize ceremonies (except for the Peace Prize). A unique feature of the city is its metro system, which is considered the 'world's longest art gallery'; over 90% of the 100 stations are decorated with paintings, mosaics, and sculptures. Stockholm is a global leader in sustainability, aiming to be fossil-fuel-free by 2040. The city's surroundings include a vast archipelago of roughly 30,000 islands and islets, providing a unique blend of urban sophistication and wild nature.